Optical assembly includes a hollow backlight having at least one light input edge and at least one light source positioned adjacent to the at least one light input edge. A back reflector is positioned at or in close proximity to a first side of the hollow backlight for reflecting the light through the...http://www.google.com/patents/US7806539?utm_source=gb-gplus-sharePatent US7806539 - Transreflectors, transreflector systems and displays and methods of making transreflectors
